/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkRecordDraw_DEFINED
#define SkRecordDraw_DEFINED

#include "include/core/SkBBHFactory.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkM44.h"
#include "include/core/SkPicture.h"
#include "include/private/base/SkNoncopyable.h"

class SkDrawable;
class SkRecord;
struct SkRect;

// Calculate conservative identity space bounds for each op in the record.
void SkRecordFillBounds(const SkRect &cullRect, const SkRecord &, SkRect bounds[], SkBBoxHierarchy::Metadata[]);

// Draw an SkRecord into an SkCanvas.  A convenience wrapper around SkRecords::Draw.
void SkRecordDraw(const SkRecord &, SkCanvas *, SkPicture const * const drawablePicts[], SkDrawable * const drawables[],
    int drawableCount, const SkBBoxHierarchy *, SkPicture::AbortCallback *);

namespace SkRecords {
// This is an SkRecord visitor that will draw that SkRecord to an SkCanvas.
class Draw : SkNoncopyable {
public:
    explicit Draw(SkCanvas *canvas, SkPicture const * const drawablePicts[], SkDrawable * const drawables[],
        int drawableCount, const SkM44 *initialCTM = nullptr)
        : fInitialCTM(initialCTM ? *initialCTM : canvas->getLocalToDevice()),
          fCanvas(canvas),
          fDrawablePicts(drawablePicts),
          fDrawables(drawables),
          fDrawableCount(drawableCount)
    {}

    // This operator calls methods on the |canvas|. The various draw() wrapper
    // methods around SkCanvas are defined by the DRAW() macro in
    // SkRecordDraw.cpp.
    template <typename T> void operator () (const T &r)
    {
        this->draw(r);
    }

protected:
    SkPicture const * const * drawablePicts() const
    {
        return fDrawablePicts;
    }
    int drawableCount() const
    {
        return fDrawableCount;
    }

private:
    // No base case, so we'll be compile-time checked that we implement all possibilities.
    template <typename T> void draw(const T &);

    const SkM44 fInitialCTM;
    SkCanvas *fCanvas;
    SkPicture const * const * fDrawablePicts;
    SkDrawable * const * fDrawables;
    int fDrawableCount;
};
} // namespace SkRecords

#endif // SkRecordDraw_DEFINED
